Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:STILPNOMELANE
Formula:K(Fe2+,Mg,Fe3+,Al)8(Si,Al)12(O,OH)27 · 2H2O
Crystal System:Monoclinic / Anorthic (Triclinic)
Strunz Nr:8/H.17-40
Group:Smectite Group
References:MM 42 (1978), 361; HB2/2 (1995)
Type Locality:Obergrund, Zuckmantel, Silesia, Poland

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